42891543 ÷ 628 
The aim is to understand the frequency of 628 in 42891543.

Going ahead to step 1:
628 goes into 4 0 times with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 628

Moving on to step 2:
The number 628 fits into 42 0 times, leaving a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Fetch the next digit (8) from the dividend, attach it to 42 and continue: 428 / 628

Advancing to step 3:
628 can be fit into 428 0 times, resulting in a remainder of 428.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 428 leaves us with 428.
Take the next digit (9) from the dividend and append it to 428, then repeat: 4289 / 628

On to step 4:
628 goes into 4289 6 times with a remainder of 521.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we subtract 3768 from 4289, we get 521.
Fetch the next digit (1) from the dividend, attach it to 521 and continue: 5211 / 628

Advancing to step 5:
5211 divided by 628 is 8 with a remainder of 187.
Use 8 as the next digit of our solution. 
Result so far: 68.0
Subtracting 5024 from 5211 leaves us with 187.
Take the next digit (5) from the dividend and append it to 187, then repeat: 1875 / 628

Going ahead to step 6:
628 can be fit into 1875 2 times, resulting in a remainder of 619.
The next digit of our result is 2. 
Result so far: 682.0
If we take 1256 away from 1875, we end up with 619.
Append the next digit (4) from the dividend to 619 and continue with: 6194 / 628

Advancing to step 7:
The number 628 fits into 6194 9 times, leaving a remainder of 542.
Put 9 as the next digit of the answer. 
Result so far: 6829.0
Deduct 5652 from 6194 and we're left with 542.
Include the next digit (3) from the dividend after 542, then repeat: 5423 / 628

On to step 8:
The number 628 fits into 5423 8 times, leaving a remainder of 399.
Write down 8 as next digit of the result. 
Result so far: 68298.0
Subtracting 5024 from 5423 leaves us with 399.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3990, and continue the process.

Advancing to step 9:
628 can be fit into 3990 6 times, resulting in a remainder of 222.
The next digit of our result is 6. 
Result so far: 68298.6
If we subtract 3768 from 3990, we get 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

Let's proceed to step 10:
628 can be fit into 2220 3 times, resulting in a remainder of 336.
Write down 3 as next digit of the result. 
Result so far: 68298.63
The remainder is 336 after subtracting 1884 from 2220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

Step 11:
The number 628 fits into 3360 5 times, leaving a remainder of 220.
The number 5 becomes the next digit in our result. 
Result so far: 68298.635
Subtracting 3140 from 3360 leaves us with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Advancing to step 12:
628 goes into 2200 3 times with a remainder of 316.
Record the quotient 3 as the next digit in the result. 
Result so far: 68298.6353
The remainder is 316 after subtracting 1884 from 2200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3160, and continue the process.

Let's proceed to step 13:
When dividing 3160 by 628, we get 5 with a remainder of 20.
Use 5 as the next digit of our solution. 
Result so far: 68298.63535
Deduct 3140 from 3160 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 14:
When dividing 200 by 628, we get 0 with a remainder of 200.
The number 0 becomes the next digit in our result. 
Result so far: 68298.63535
The remainder is 200 after subtracting 0 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Moving on to step 15:
628 can be fit into 2000 3 times, resulting in a remainder of 116.
The number 3 becomes the next digit in our result. 
Result so far: 68298.6353503
The remainder is 116 after subtracting 1884 from 2000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Step 16:
1160 divided by 628 is 1 with a remainder of 532.
The next digit of our result is 1. 
Result so far: 68298.63535031
If we take 628 away from 1160, we end up with 532.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5320, and continue the process.

The final outcome is 68298.63535031, with a leftover of 5.32e-07.